Paper-feed mechanism for type-writing machines.



0. 0; KAVLE.

PAPER FEED MECHANISM FOR TYPE WRITING MACHINES.

A APPLICATION FILED AUG. 3, 1908.

1,033,415. Patented July 23, 1912.

2 SHEETB SHEE T 2.

s l 1771 80/01. zl a hzesses" g F k I A] oz? 771 44 w /%W% 55 121 ("566 low-legs UNITED STATES PATENT OFFICE.

OSCAR C. KAVLE, OF SYRACUSE, NEW YORK, ASSIGNOR T0 HARVEY A. MOYER, OF

SYRACUSE, NEW YORK.

PAPER-FEED MECHANISM FOR TYPE-WRITIN G MACHINES.

To all whom it may concern:

- Be it known that I, OSCAR C. KAVLE, a citizen of the United States, residing at Syracuse, in the county of Onondaga and State of New York, have invented a new and useful Improvement in Paper-Feed Mechanisms for Type-lVriting Machines,

of which the following is a specification.

This invention relates more particularly to improvements in paper feeding and guiding mechanism for typewriting machines.

The objects of the invention are to produce an efficient mechanism of simple and inexpensive construction in which the feed or presserrolls automatically adjust themselves to different thicknesses of paper and papers which are not of uniform thickness, and insure the proper feeding of the paper; also to construct the mechanism so that it can be applied with but slight change to carriages of different lengths; also to make the mechanism largely of'sheet metal and wire parts to reduce the weight and cost thereof; also to support the feed rolls by a flexible frame composed in part by the paper guides; also to provide a paper feed table with simple and inexpensive means for a' taching it to the carriage; and to improvj paper feed mechanisms for typewribrs and analogous machines in the respects hereinafter described and set forth in the claims.

In the accompanying drawings, consisting of two sheets: Figure 1 is a front elevation, partly broken away, of a typewriter carriage provided with paper feed and guide means embodying the invention. Fig. 2 is a plan view, partly in section, thereof. Fig. 3 is a sectional plan view thereof in line 33, Fig. 5. Fig. 4 is an end elevation thereof. Figs. 5" and 6 are transverse sectional elevations thereof in lines 5-5 and 6 6, respectively, Fig. 1. Fig. 7 is a fragmentary perspective view of adjacent guides.

Like letters of reference refer to like parts in the several figures.

A represents the platen which is removably journaled in a carriage, consisting of end plates B connected by a casting b and a scale bar I). The construction of the carriage and means for remowably securing thev platen-therein are substantially as dis- Specification of Letters Patent.

Application filed August 3, 1908.

Patented'July 23, 1912. Serial No. 441?,578.

closed in my prior application, Serial No. 311,756, filed April 14, 1906.

0 represents sheet metal paper guides which are secured at their rear ends, by screws d, or other fastenings, to upright lugs d, on the carriage, and curve downwardly, forwardly and upwardly under the platen with their free front ends close to the platen. The forward portions of the paper guides are connected by two slender horizontal rods or wires E and F which pass through holes in down-turned lugs e and f formed on the guides. The wires E and F are loose in the lugs e and f but they extend n rly from one end plate of the carriage to the other, and the plates prevent displacement of the wires. The wires E and F are of spring temper, and the sheet metal guides and wires form an exceedingly light and flexible frame that can yield bodily at its front and can also be flexed at any part of its length.

' G and H represent respectively front and rear, or delivery and receiving aper feed or pressure rolls. The front roll are journaled on the wire E between the paper guides. The rear rolls are journaled on separate short shafts i, Figs. 2 and 5, rentovably seated in open slots i, in the forked rear ends of auxiliary sheet metal paper guides or roll supports I which are arranged between the guides C and are pivoted by down-turned perforated lugs 2' at their front ends on the wire F. The rolls H could be suitably journaled on pivoted supports I of other construction.

Ordinary rubber-covered wooden rolls are employed and the rear rolls have the usual metal sleeves bearing on the shafts 2', but the front rolls, see Fig. 2, preferably have short bushings h in their ends that bear on the wire E and leave'enlarged openings iii the rolls between the bushings. The object of this construction is tq enable the wire E to fiex slightly inside of the front rolls as Well as between them without creating friction in" the bearings.

K, Figs. 2, 3 and 5, represents a rock shaft which is seated at its ends in bearings in the carriage end-plates and rests in seats in the carriage lugs 03 beneath the rear ends of the paper guides, which prevents the shaft "from springing between its ends.

5. with a single spring at ong, end of the shaft Arms is rigidly secured to the rock shaft K and projecting forwardly therefroigi under the paper guides C are connected at their forward ends by a spring rod or wire is. This rod extends horizontally beneath the guides C and I and normally bears against the auxiliary guides I, which are arranged slightly lower than the other guides C. The rod is is pressed upwardly by suitable means, such as springs L surrounding the ends of the rock shaft, and holds the rear rolls H yieldingly against the platen. As the engagement of the rear rolls with the platen limits the upward swing of the auxiliary guides, the upward pressure of the rod thereon, acting through the connecting wires F also presses the front ends of the paper guides C u wardly and holds the front rolls G yiel ingly against the platen.

An arm or handle M, Figs. 1, 2 and 4, is secured to one end of the rock shaft for rocking it to allow the feed rolls to move away from the platen. The paper guldes have a normal tendency to sprin away from the platen, and whenever the forward end of the lever M is depressed, the guides swing the front rolls away from the platen, and the pressure of the rod in" on the auxiliary guides being relieved, the rear rolls fall away from the platen by their own weight, thus freeing the paper on the platen and permitting it to be shifted as may be desired.

N, Figs. 2 and 4, represents spring-adjusting levers having hollow hubs seated in holes in the carriage end-plates and in which the ends of the rock shaft K bear. Each spring L for the rock shaft is secured at one end to the rock shaft and at the other end to the hub of the adjacent adjusting lever N, see Fig. 2. Securing screws a passing through slots n in the adjusting levers concentric with the rock shaft in the ends of the carriage, permit the levers to be adjusted to tension the springs L as may be desired. By having a spring L at each end of the rock shaft the pressure of the rod is at both ends is practically the same, and this result cannot be obtained unless a shaft of undue size is used, owing to the tendency of the shaft to twist.

The rock shaft and connected wire is constructed and operated as described prouces a desirable flexible rocking pressure frame or device for the feed rolls. but other pressure means could be employed.

In a carriage of ordinary length. such as shown in the drawings, four paper guides C with three auxiliary guides and three pairs of tandem feed rolls between them are employed. For shorter carriage, one less guide C and pair of rolls with the corresponding auxiliary guide I are used,

and for longer carriages one or more pairs of rolls with the corresponding guides C and I are employed. No other change is required to adapt the feed mechanism to carriages of different lengths except to make the wires E and F and the rock shaft K with its pressure rod is of suitable length. The guides C lead the paper from the lower edge of the feed table, hereinafter described, to the rear rolls H without the aid of the auxiliary guides I, but when the advance edge of the paper passes the rear rolls, from which point. it should begin to curve arofind the platen, the auxiliary guides assist 'in guiding the paper and insure its bein properly presented to the front rolls. The pressure rod 7: yields enough to allow first the rear rolls and then the front rolls to be forced away from the platen by the advance edge of the paper when inserting the sheets,.

and if sheets of uneven thickness, such as are folded at one edge, or have central recording strips, are used, either roll or either pair of rolls can yield as much required, independently of the other rolls, on account of the flexible nature of the feed roll support and pressure device. rollsare'held parallel with the platen at all times so as to feed the paper straight, regardless of whether it is of uniform thickness. The platen can be removedfrom the carriage, leaving the feed mechanism all in place, and when the rolls require to be renewed, the rear rolls with their shaft can be simply lifted out of the bearing slots, and by raising the front rolls until their axle wire E is opposite a hole 0, Fig. 4, in the end of the carriage, the wire can be slipped endwise through said hole to release any or all of the front rolls. After relacing the rolls the wire E is shoved back lnto place, and when the platen is again placed in the carriage it will hold the front rolls down with the axle wire E therefor below the hole 0 so that the wire will be retained in place by the ends of the carriage.

As the seven guides are composed of sheet metal stampings in two patterns and are connected by wires, the roll supporting frame is inexpensive to make and the parts can be easily resembled, and as feed rolls just alike are used for carriages of all lengths there can be no confusion in applying the mechanism to diflerent carriages, or in ordering rolls for repairs.

P represents a paper feed table or shelf arranged. as usual. to extend upwardly and rcarwardly from the rear ends of the paper guides. The table may be of any suita construction, but preferably consists of a piece of sheet metal formed with sumiorting portions at its lower edge separated by slots or openings 77 through which the rear ends of the paper guides C extend for illltll'llllfllll But all of the to thecarriage. The supporting portions are bent to form spring clipsp which embrace the rock shaft K between the paper guides, and depending legs p between the c ips which bear against the back of the carriage and prevent the table from falling backwardly. The table is thus detachably secured in place on the carriage by integral portions thereof without separate fastening devices, and it can be readily applied and removed. The table can also be tilted for wardly to afford access to parts of the machine (not shown) that are located under it. The feed table thus constructed is adapted for use with other feed mechanisms.

The rolls shown are all of the same length, but if preferred, long central rolls and short end rolls could be employed. The construction of the roll supporting structure consisting of the main and auxiliary guides, or roll supports, and the means for yieldingly holding the rolls to the platen can also be modified without departing from the invention. The feed roll mechanism is also applicable to adding and other machines analogous to typewriters.

I claim as my invention:

1. In a paper feed mechanism. the combination of a rotary platen, a series of inde pendently yieldable paper guides secured and supported at one end, connections be tween and supported by the movable ends of the guides, and one or more feed rolls mounted on said connectiops, substantially as set forth.

2. In a paper feed mechanism, the comhiv iliation of a carriage, a platen, independently yieldable paper guides attachedat one end i to the carriage, a flexible rod connecting the nation of a rotary platen, a series of inde pendently yieldable paper guides rigidly supported in rear of the platen, connections between the guides, and one or more feed rolls mounted on said connections, substantially as-srt forth.

3. In a paper feed mechanism, the combi nation of a rotary platen, a series of flexible paper guides, a flexible connection between the guides and supported thereby, and one or more feed rolls mounted on said connection, substantially as set forth.

4. In a paper feed mechanism. the combination of a rotary platen, a series of inde pendent. flexible paper guides, a flexible connection common to the whole series of guides and supported thereby, and a series of feed rolls mounted on said common connection, substantially as set forth.

5. In a paper feed mechanism, the combination of a carriage, a rotary platen, a series of independent flexible paper guides at tac \ed at onc -end to the carriage, a flexibleconnection between said guides remote fro! i the attached ends thereof, and a series of teed rolls mounted on said connection, subs antiallv as set forth.

6. In a paper feed mechanism, the comhi natitn of a rotary platen, independently yieldable main paper guides, an auxiliary paper guide arranged between and suported by said main guides, and feed rolls supported by said main and auxiliary guides, substantially as set forth.

7. In a paper feed mechanism, the combination of a carriage, arotary platen. independently yieldable main paper guides attached at one end to the carriage, an auxiliary paper guide arranged between said main guides and connected to the free ends thereof, feed rolls supported by the free ends of said main and auxiliary guides, and means for pressing said rolls against the platen, substantially as set forth.

8. In a paper feed mechanism, the combination of a rotary platen, a series of independently yieldable paper guides, a series of feed rolls arranged between the guides and supported thereby, a series of auxiliary paper guides arranged between said guides and connected thereto, and a series of feed rolls jou'rnaled on said auxiliary guides between the main guides, substantially as set forth.

9. In a paper feed mechanism, the combination of a carriage, a rotary platen, independently yieldable paper guides attached at one. end to the carriage, a roll'support arranged between said guides and connected to the free ends of said guides and extending toward the attached ends thereof, feed rolls supported by the free ends of said guides and roll supports, said rolls being pressed yieldingly against the platen, substantially as set forth.

10. In a paper feed mechanism, the combifree ends of said guides, a feed roll Journaled on said rod, a roll support arranged between" said guides and connected to the free ends of said guides and extending toward the attached ends thereof, a feed roll journaled at the free end of said roll support, and means for pressing said last men tioned feed roll against the platen, substantially as set forth.

11. In a paper feed mechanism, the com bination of a carriage. a platen, a series of flexible mam paper guides attached at their rear ends t9 the carriage, a flexible rod connecting the front ends of said guides. a series of auxiliary guides arranged between said main guides and pivoted to the front ends thereof, feed rolls supported by the front ends of said main guides and the rear ends of said auxiliary guides, and means for pressing said feed rolls against the platen. substantially as set forth.

19..In a paper feed mechanism, the combination of a carriage, a rotary platen, a series of feed rolls, and a, supporting frame for the rolls consisting of series of flexible sheet metal parts; adapted to yield independently and a connecting flexible wire, substantially as set forth.

13. In a paper feed mechanism, the combination of a carriage, a rotary platen, a series of receiving feed rolls, a series of delivery feed rolls, a series of flexible paper guides, flexible wires connecting'both series of rolls to the flexible guides, and means for holding all of said rolls yieldingly againstthe platen, substantially as set forth.

14. In a paper feed mechanism, the combination'of a carriage, a rotary platen, two series of feed rolls, one arranged in rear of the other, and a supporting frame for both series of rolls consisting of a series of flexible paper guides, a series of yielding supports for one series of rolls, and flexible wires connecting the paper guides and also ccnnccting the two series of rolls to said guides, substantially as set forth.

15. In a paper feed mechanism, the combination of a carriage, a rotary platen, a series of pairs of feed rolls arranged in tandem, and a flexible frame which forms the entire support for the rolls and'co-nsists of a series of sheet metal parts of two difl'erent forms, and connecting wires, substantially as set forth.

16. In a paper feed mechanism, the combination of a carriage, a rotary platen, a series of independently yieldable paper guides attached at one end to the carriage, two flexible wires connectin the free ends of said guides, a series of feed rolls journaled between said guides on one of said -wires, roll supports mounted between said guides on said other wire, feed rolls journaled on said supports, and means for pressing said feed rolls against the platen, substantially as set forth.

1?. In a paper feed mechanism, the combinat'mnof a carriage, a rotary platen. two series of feed rolls arranged in two different lines, and two sets of paper guides arranged alternately and forming a substantially continuous guide between the two series of rolls.

one set of guides supporting one series of rolls and the other set of guides supporting the other series of rolls, su stantially as set; forth.

18. In a paper feed nwehanism, the combinaticn of a eaiuiage, a rotary platen. a feed roll, a spring support for the 1- -1; which tends to more the roll. away from the come the spring press re of said support and force the roll yieldingly against the platen. substantially as set forth.

19. In a paper fred mechanism, the comhinatiun of a carriage, a rotary platen, a series of independent pairs of feed rolls, a flexible supper-ting frame for the rolls which allows any roll to yield independently of the other rolls, and an inde iendent releasable spring-pressed device which normally actu ates the flexible frame to ln'ld all of the rolls yieldingly against the platen, substantially as set forth.

20'. In a paper feed merhanism, the combinatirn of a carriage. a rotary platen, a series of indeprxulmitly yicldable pairs of feed rolls, a flexible frame for rolls, an independent flexible spring-pressetl device which holds all of the rolls against the platen with a melding pressure. and means for manually releasing said ring-pressed means, substantially as set forth.

ll. In a paper feed mechanism, the com binaticn of a carriage, a rotary platen, a series of pairs of feed rolls, a flexible supporting frame for said rolls, one roll of each pair being mounted on the flexible frame. a separate part yicldably connected to the flexible frame en which the other roll of each pair is mounted, and means acting on said ,SKZ) a rate part to press all of the. rolls yicldingly against the platen. substantialtr as set forth.

\Vitness my hand. this 30th day ofJuly, 1 0$.

oscxa c. icxvmc.

Witnesses:

l nxxn ll. lit-Ill), Cin-ts'rnn U. llmn.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C. 

